Compact 92mm size (125mm height) for excellent PCIe compatibility and 4U support, high cooling performance thanks to 4 heatpipes, dual-tower design and two NF-A9 premium fans, ideal for quiet 4U servers Supports both E1 (LGA4677-1) and E2 (LGA4710-2) socket Intel Xeon processors CPU carrier frame required (included with boxed retail CPUs and available separately for tray CPUs) Two award-winning NF-A9 fans (push/pull dual fan configuration), supporting PWM for automatic speed control through the motherboard: silent at idle, full CFM performance when necessary Pre-applied NT-H1 thermal compound and easy, straightforward installation with included Torx T30 mounting tool